ENERGY
FRICTION
ENERGY SOURCES
SIMPLE MACHINES
100
Energy in motion is _________ energy
Kinetic
100
The wheels of a car touching the road uses what type of friction?
Rolling
100
There is Renewable and ____________ energy sources
Non-renewable
100
Is a see-saw a simple machine?
Yes
200
Energy at rest is called ___________ energy.
Potential
200
Swimming in the ocean has what type of friction?
Fluid
200
How do we harness wind for energy?
Wind mill/turbine
200
Is a baseball bat a simple machine?
Yes
300
If a ball rests on a shelf, at which height does it have the most potential energy? 15 inches...25 inches...35 inches.
35 inches
300
What would happen if we had no friction?
Always falling
300
Why is natural gas a non-renewable resource?
Takes millions of years to replenish
300
Name 3 types of simple machines
Lever...Wedge...Pulley...Wheel and Axle...Incline Plane...Screw.
400
When does a falling ball have the most kinetic energy? Top of fall...In the middle...Right at bottom.
Right at bottom
400
If an object has a lot of friction is it smooth or rough?
Rough
400
Name 3 renewable resources.
Solar, Wind, Geothermal, Biomass, Hydropower
400
Name one type of screw...but not a screw you put in the wall.
Any object with threads in it
500
When does potential energy change to kinetic energy?
When the ball starts to move
500
How can you reduce friction?
Lubricants or smoothing
500
Approximately what % of energy comes from renewable resources. 10%...15%...20%
10%
500
How many types of levers are there?
3
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